Extrusions for carrying ceiling tiles and window curtains, shades, and the like

ABSTRACT

A structure to be used in buildings or the like for supporting ceiling tiles as well as for supporting window curtains, shades, or the like. An elongated extrusion has at its upper surface structure for supporting the extrusion in a horizontal attitude from a suitable beam or the like with the extrusion having an inner side edge region adapted to support ceiling tiles and an outer side edge region adapted to be located next to an upper frame member situated over a window. Between its side edge regions the extrusion is provided with a downwardly directed hollow channel defined by vertical wall portions of the extrusion and an upper horizontal wall portion extending between the vertical wall portions. These vertical wall portions are respectively formed with grooves extending parallel to each other longitudinally of the extrusion and communicating with the interior of the channel. These grooves are adapted to receive opposed side edges of a carrier structure situated in the channel for carrying units such as window curtains, Venetian blinds, or the like. This carrier structure is supported exclusively by the location of its opposed side edges in the grooves, so that there is no necessity of fastening the carrier structure to the extrusion.

United States Patent 1 Cohen [4 Jan. 9, 1973 [54] EXTRUSIONS FOR CARRYING [57] ABSTRACT CEILING TILES AND WINDOW A structure to be used in buildings or the like for sup- CURTAINS, SHADES AND THE LIKE porting ceiling tiles as well as for supporting window [76] Inventor: Seymour Cohen, 21 Newport Drive curtains, shades, or the like. An elongated extrusion Plainview, 11803 has at its upper surface structure for supportmgthe extrusion in a horizontal attitude from a suitable beam Flled: 1971 or the like with the extrusion having an inner side [21] Appl. No.: 117,002 edge region adapted to support ceiling tiles and an outer side edge region adapted to be located next to Related US. Application Data an upper frame member situated over a window. Between its side edge regions the extrusion is provided [63] gy of July with adownwardly directed hollow channel defined by vertical wall portions of the extrusion and an upper horizontal wall portion extending between the vertical [52] US. Cl. ..52/39, 52/173,l562;13z45, wall portions These vertical wall portions are respec Cl G09 tively formed with grooves extending parallel to each I o u v "v i u: other longitudinally of the extrusion and communicat- [58] Flew Say-ch 173; ing with the interior of the channel. These grooves are 248/343 160/345 16/93 94 95 adapted to receive opposed side edges of a carrier 96 D structure situated in the channel for carrying units such as window curtains, Venetian blinds, or the like. [56] References C'ted This carrier structure is supported exclusively by the UNITED STATES PATENTS location of its opposed side edges in the grooves, so

that there is no necessity of fastening the carrier struc- 3,346,909 10/1967 Blackburn ..l6/94 D ture t0 the extrusion. 7

3,004,636 10/1961 Shane .52/484 X r 2,910,738 11/1959 McCorkcll ..52/484 X Primary ExaminerPrice C. Faw, Jr.

Attorney-Steinberg & Blake 11 Claims, 5 Drawing Figures PAIENTEDJAN 9 ma SHEET 1 OF 4 R Q &

u ww fiN W? 19% INVENTOR. SEYMOUR COHEN ATTORNEYS PATENTEDJAN 9 I975 3,708,927

- sum 2 or 4 mvs' R. SEYMOUR EN ATTORNEYS PATENTEDJAN 9 1975 saw u [1F 4 N v WW l ln Q: M MHPQ I m Q E "W. i

NI Muunnuuuuununu INVENTOR. SEYMOUR CO EXTRUSIONS FOR CARRYING CEILING TILES AND WINDOW CURTAINS, SHADES, AND THE LIKE CROSS REFERENCE TO RELATED APPLICATION This application is a continuation-in-part of copending application Ser. No. 57,066, filed July 22, 1970, and entitled CEILING TILE SUPPORTS.

BACKGROUND OF THE INVENTION be used in connection with carrying window curtains,

Venetian blinds, and the like. At the present time considerable problems are encountered in fastening to suitable elements the structures which are required to carry the Venetian blinds, curtains, or the like, and in addition problems are encountered in providing for flow of air for air-conditioning purposes. Thus, a considerable amount of labor and time is required to fasten brackets'or other elements which are to carry window shades, curtains, or the like, and also considerable time and labor is involved in providing for air-flow from a room to the plenum chamber over the ceiling tiles.

SUMMARY OF THE INVENTION It is accordingly-a primary object of the present invention to provide a structure which will greatly reduce the time and labor required in connection with provision of suitable supports for window shades, Venetian blinds, or the like, as well as in connection with provision of openings through which air can flow to .the

plenum chamber from a room beneath the ceiling tiles.

In particular, it is an object of the present invention to provide'a relatively inexpensive extrusion which can readily be mounted for the purpose not only of support- .carry curtains, window shades, or the like to be readily placed in position with an extremely small amount of labor in an extremely short time while requiring no fasteners to be used.

It is also an object of the present invention to provide an extrusion of this type which can be readily mounted in its position of use. Also, it is an object of the present invention to provide simple components to be used with the extrusion and which are readily assembled therewith, without the use of any fasteners, for the purposes of supporting window shades, Venetian blinds, or the like, as well as for supporting the extrusion itself and aligning a series of extrusions.

According to the invention the extrusion has an inner side edge region which is adapted to support ceiling tiles and an outer side edge region which is adapted to be located next to a frame member over a window. The extrusion has an upper surface provided with a means for supporting the extrusion from a building element. The extrusion is formed with a downwardly directed hollow channel extending longitudinally of the extrusion and defined between a pair of vertical wall per-- tions of the extrusion and an upper horizontal wall portion extending between the vertical wall portions. These vertical wall portions are respectively formed with grooves which are parallel to each other and extend longitudinally of the extrusion, these grooves being horizontal and communicating with the interior of the channel. A carrier means is provided for carrying units such as Venetian blinds, window curtains, orthe like. This carrier means has a pair of opposed side edges respectively located in these extrusion grooves and supported exclusively by location of the side edges of the carrier means in the grooves, so that no fasteners are required with the structure of the invention.

BRIEF DESCRIPTION OF DRAWINGS The invention is illustrated by way of example in the accompanying drawings which form part of this application and in which: I

FIG. I is a transverse sectional elevation of an extrusion according to the invention shown schematically in FIG. 1 with additional parts associated with the extrusion;

' FIG. 2 is a fragmentary exploded perspective illustration of several of the components shown in FIG. 1;

FIG. 3 is a transverse sectional elevation of another embodiment of an extrusion of the invention;

FIG. 4 is a transverse sectional elevation of a further embodiment of an extrusion according to the invention; and a .FIG. 5 is a schematic fragmentary longitudinal sectional elevation taken along line 55 of FIG. 4 in the direction of the arrows.

DESCRIPTION OF PREFERRED EMBODIMENTS Referring now to the drawings, there is illustrated in FIG. 1 an extrusion 10 according to theinvention. This extrusion 10 is continuously extruded through a suitable extrusion die and is cut into any desired lengths. The extrusion is made preferably of a metal which has a certain amount of springiness for a purpose referred to below. The extrusion 10 may be made from aluminum, for example, and, if desired, it may be coated as with a suitable covering of paint of any desired color.

The extrusion 10 of the invention has an inner side edge region 12 which is adapted to support ceiling tiles 14 in the manner shown schematically at the lower right portion of FIG. 1. The extrusion also hasv an outer side edge region 16 adapted to be located next to a frame member 18 located over a window and forming for example, a window closure component. At its outer side edgeregion 16 the extrusion 10 may have an upwardly directed flange. 20 to be fastened by suitable rivets 22 to a downwardly extending flange 24 ofthe frame member 18 which in turn may be fastened by suitable rivets or the like to a stationary structural component 26.

At. its upperwsurface, the. extrusion is provided with a means 28 for supporting the extrusion from any suitable structural element such as the beam 30 which may be a black iron channel. As isapparent particularly from FIG. 2,,the means 28 isin the form of a web of the extrusion which extends vertically and is formed with openings 32.. These openings 32 are adapted to receive legs 34 of suspending elements 36 in the form of plates adapted to extend around the beams 30 and having angled legs34 which respectively pass through the openings 32. Through this .simple structure it becomes possible to support the extrusions 10 at the required elevation in a horizontal attitude, and the rivets 22 will fixedly hold the extrusions at their proper,

horizontal attitude and elevation.

The web 28 extends upwardly from a downwardly directed hollowchannel 38 of the extrusion. This chan-' nel 38 is defined between a pairof vertical wall portions 40 and 42 of the extrusion 10. These vertical wall portions are interconnected by an upper horizontal wall portion 44.The vertical wall portions 40 and 42 are respectively: formed with grooves 46 and 48 which are parallel to each other and extend horizontally, longitudinally of the extrusion. These grooves 46 and 48 communicate with the interior of the channel 38, with the groove 48 being an upper groove situated next to the horizontal wall-44 while the groove 46 is a lower groove situated adjacent the lower surface of the extrusion 10. The lower, groove 46 is limited at its lower region by an inwardly extending rib 50 which is formed with a downwardly directed inclined surface 52 forming a bevel for a purpose referred'to below.

In the example shown in FIGS. '1 and 2," the channel 38 is adapted to support in its interior a carrier means 1 54 for carrying vertically extending curtains which can be horizontally shifted for covering and uncovering a window. The carrier means 54 is itself in the form of an extrusion' which may be made of the same material as the extrusion It)": This carrier means 54 has a pair of opposed side edges 56 and 7 5 8 which are respectively located in the 'gioove 48 and 46. Thus it will be seen that the side edgesf5 6 and 5 8 are upper'and lower side edges-of the carrier means 5 4. This carrier means is supported only andexclusiv ely by thelocation of the side edges 5 6,and 58 respectively in the grooves 48 and As is'apparentfrom FIGS.'1 and 2, the carrier means 54 is itself formedwith a-"pair, of channels-'60 and 62. The channel 62' is; adapted to support glides which are adapted to slide along .the interior of thechannel 62. These glides" will .,have upper portions situated within the channel 62 and will be formed with grooves or the like for receivingthe ribs 64. These glides have lower eyes adapted to receive hooks or the like from which a curtain is suspended. Thusthe. glides in a well known manner will simply slip along the channel 62 in order to close or open a curtain, and suitable strings, wires, cords,-or the like, may be used to interconnect this series of glides with eachother.

The channel 60 will accommodate control cords guided over suitable rollers and actuating suitable pushing or pulling elements which are connected with manipulation of these cords it is possible to open and close the curtains. This structure located in the channel 60 and 62 for supporting the curtain is conventional and forms no part of the invention.

As is apparent from FIGS. 1 and ,2, the sideedge 58 of the carrier means 54 is'in the form of a rib having a convexly curved configuration while the side edge 56' simply forms an extension of the upper wall of the car-.

rier means 54. With this construction it is only necessary, in order to mount the carrier means 54 in the channel 38, for the operator first to place the edge 56 in the groove 48, and-then to snap'the rib 58 past the rib 50. For this purpose the rib 58 will first slide along the bevel52, with the extrusion 10 yielding sufficiently so that the side edge 58 will'snap into the groove 46. Through this exceedingly simple rapid operation it becomes possibleto reliablymount the carrier means 54 in the channel 38 without the useof any fasteners. An exceedingly small amount of time and labor is required for this purpose. Once the extrusions 10 are mounted in position in end-to-end relation, it is a simple matter to snap the extrusions which form the carrier means 54 oneafter theother in position so that curtains for windows of any desired width can be readily accommodated. Thus, without the used any fasteners such as screws, bolts and nuts, rivets,;or the like, it is possible with the invention to quickly snap the carrier means 54 in its operative position, greatly reducing the time and labor conventionally required for this purpose.

. The space above the ceiling tiles 14 and the extru- I sions 10, between the'latter-and the next-upper floor (FIG. 2 through which the. ah can readily' flow into the V plenum chamber 16 For this purpose itis preferred to form the extrusion 10 with a second channel '70 defined between the vertical walls 72 and the horizontal wall 74 which isiformed with the opening. 68 Theseopenings 68 are simply punched through the wall 74 after the extrus'ion is: formed. In'thisway'the extrusion forms a recess for receiving the returning air and serving to recess the openings 68upwart'lly beyond the bottom surface of the ceiling tiles an d' thejextrusion "-110. Thus, dust or other-particles which are like-to collect along the edges of the openings "68 will'not be exposed at the lowest surface area'of theextrusion 10;" I I In order to align successive extrusions and to further support the extrusions,-they are provided with elongated'angleportions 76 forming extensions of the walls 72 and defining a pair of grooves which are directed toward-each other and located directly over the wall 74. These grooves 78 are adapted to receive opposed side edgesof a horizontal web 80 of a plurality of T- shaped support members 82 which have upwardly directed webs 84 formed with openings 86 corresponding to the openings 32 and coacting with the hangar elements 36 in the manner described above. These members 82 are of sufficiently short length and are distributed in such away as to provide for the required flow of air through the openings 68. Also the members 82 will be arranged across the butting edges of a pair of successive extrusions extending into the grooves 78 of both extrusions so as to accurately align successive extrusions with each other.

It is not essential to provide the extrusions of the invention with the additional channels 70 and with the capability of providing for flow of air into a plenum chamber 66. In certain buildings where such plenum chambers are not provided, it is possible to use an extrusion 90 as shown in FIG. 3. This extrusion 90 is identical with the extrusion 10 in all respects except that it does not have the channel 70. However, for alignment purposes the extrusion 90 is formed with the elongated angle portions 92 defining at the upper surface of the extrusion 90 a pair of grooves 94 directed toward each other. These grooves are adapted to receive simple alignment bars whose opposite side edges are located in the grooves 94. These bars will extend across the adjoining edges of successive extrusions 90 for the purpose of aligning them with each other. The extrusion 90 will accommodate a carrier means 54 in precisely the same way as described above in con nection with FIGS. 1 and 2.

When it is desired to support, in front of the windows, Venetian blinds rather than curtains, the structure of FIGS. 4 and 5 may be used. Referring to FIG. 4, there is illustrated therein an extrusion 100 which is identical with the extrusion 10 except that the extrusion 100 is formed with a downwardly directed hollow channel 102 which is deeper than the channel 38. This channel 102 is defined between a pair of vertical walls 104 and 106 interconnected by a wall 108 provided with a-means for supporting the extrusion from a structural element such 'as the beam 30. Thus, the extrusion may include an upwardly directed web 110 formed with openings 112 to coact with the hangar elements 36 in the manner described above.

The walls 104 and 106 are respectively formed with grooves 114 and 116 located adjacent the lower surface of the'extrusion and situated at the same elevation, these grooves extending parallel to each other ina horizontal direction, longitudinally of the extrusion. It will be noted that the grooves 114 and 116 also communicate with the interior of the channel 102.

In order to support Venetian blind units 118, a carrier means 120 is provided. This carrier means 120 takes the form of simple bars or plates made of any suitable metal and having opposed side edges 122 and 124 respectively situated in the grooves 114 and 116, so that the carrier 'means 120 is also supported only and exclusively by location of its opposed side edges in the grooves of the downwardly directed channel of the extrusion.

When each extrusion 100 is mounted in its position of use, a given number of the plates or bars 120 are slipped into the grooves 114 and 116. These plates can be easily shifted along the grooves 114 and 116. FIG. 5 shows a pair of such plates 120 in one of the extrusions 100, FIG. 5 also illustrating openings 112 of the web 110. When an extremely wide window is encounteredit is necessary to situate a series of Venetian blinds next to each other. Thus, FIG. 5 shows three Venetian blind units 118a, 118b, and; 1180 situated next to each other. In order to mount these units in position, the several carrier means 120 are shifted along the grooves 114 next unit 118a can be mounted in the same way. The

tapes and cords of the Venetian blind units are suffi ciently flexible so that when mounting the last of the series of Venetian blinds the supports or carriers 12 0 therefor can readily be shifted to first permit the last unit to beinserted and then the carrier means 120 can be shifted beneath the ends of the last Venetian blind unit. As is apparent from FIG. 5, the several carrier means 120 are short enough so that the operating cords 122 for tilting and raising or lowering the slats 124 can be free to operate without engaging the plates 120.

Moreover it will be noted that with this arrangement the slats 124 of the successive Venetian blinds will be located directly next to each other forming the effect of one continuous Venetian blind for an extremely 'wide window.

Except for the above differences the embodiment of FIGS. 4 and 5 is identical with that of FIG. 1, as is apparent from a comparison of FIG. 4 with FIG. 1. However, where a plenum chamber and air conditioning is not provided it is possible to eliminate a second channel 126 of the extrusion lOOand'instead to provide it only with a pair of angle portions similar to the angle portions 92 of FIG. 3, to receive alignment bars for aligning successive extrusions 100 with respect to each other in a manner described above in connection with FIG. 3.

Thus, it is apparent that with the invention relatively simple inexpensive extrusions can be readily mounted in position for accommodating, without the use of fasteners, suitable carrier means for carrying curtains, Venetian blinds, or the like,.and in addition it is a simple matter to provide the extrusions with the possibility of accommodating the air flow into the plenum chamber over the extrusion and ceiling tiles.

What is claimed is:

1. For use in buildings and the like, an elongated extrusion having an upper surface provided with a means for'supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located next to a frame-member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion and defined'by a pair of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to each other and longitudinallyof the extrusion and communicating with the interior of said channel, and carrier means for carrying a-window-covering unit such as a shade, curtain, or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part 'of the structure carried by'said carrier means situated in the interior of said channel, said carrier means being. supported exclusively by the location of said opposed side edges thereof in said grooves, said carrier means having its side edges located at different elevations to. form upper and lower side edgeswhile said grooves are also located at different elevations to form upper and lower grooves for respectively receiving said upper and lower side edges of said carrier means.

2. The combination of claim' 1 and wherein said lower groove of said extrusion is limited at its lower region by an inwardly extending rib of said extrusion and said extrusion being s'pringy for facilitating snapping of said lower side edge of said carrier means past said rib into said lower. groove after said upper side edge of said extrusion has been situated in said'upper groove.

3. The combination of claim 2 and wherein said in-v wardly extending rib of said extrusion is formed with a downwardly directed inclined surface forming a bevel which facilitates snapping of said lower side edge of said carrier means into said lower groove.

4. The combination of claim 3 and wherein said upper groove of said extrusion is situated next to said upper horizontal wall of said'channel while said lower groove is situatedadjacent a lower surface of said extrusion, and said carrier means being itself in the form of an elongated extrusion of channel-shaped configuration and having said lower side edge thereof in the form of a rib for snapping into said lower groove.

5. The combination of claim 4 and wherein said carrier means is formed with a pair of channels one for slidably supporting glides for carrying a curtain and the 7. The combination of claim 6 and wherein said extrusion is provided at said second channel thereof with other for accommodating cords'for controlling the curwindow and an opposed inner side edge region adapted to support ceilin g tiles, said extrusion be'ing formed with an elongated downwardly directed channel ex tending longitudinally of said extrusion and defined by a'pair of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions," said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to eachother and longitudinally of the extrusion and'communicating with the interior of said channel, and carrier means for carrying a window-covering unit such as .a shade, curtain or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of the structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said grooves, an air-conditioning plenum chamber being situated over saidextrusion and tiles carried thereby, and .saidextrusion being-formed adjacent said inner side edge region thereof between the latter and said channel 'of said extrusion with openings through which air can pass from the space beneath said extrusion into the plenum chamber.

an upper pair of angled portions defining over said upper horizontal'wall of said second channel a pair of grooves extending longitudinally of the extrusion and directed toward'each other, and members of substantially T-shaped cross section having side edges situated in the latter grooves and an upwardly directed web for connection to a supporting beam or the like so as to form part of said support means with said parts located in said grooves over said second channel being adapted to extend across adjoining edges of a pair of said extrusions which are situated one next to the other for aligning the extrusions.

9. For use in buildings and the like, an elongated extrusion having an upper surface provided with. a means for supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located nextto a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion'and defined by a pair of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical'wall' portions respectively being formed withlongitudinal horizontal grooves extending parallel toeach other and longitudinally of the extrusion and communicating with the interior of said channel, andcarrier means for carryinga window-covering unit such as a shade, curtain, or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of .the' structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said groovesQsaid grooves being located adjacent'a lower surface of said extrusion'and are situated at the same elevation, said carrier means being formed by aseries of plates respectively vhaving'opposed side edges situated in said grooves and adapted to be situated beneath the ends of Venetian blind units located in said chennel of said extrusion.

10. For use in buildings and the like, an elongatedextrusion having an upper surface provided with a means for supporting said extrusion. in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located next to a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directedchannel extendinglongitudinally of said extrusion and defined by a pair of vertical wall portions of said extrusion an an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal pair of elongated parallel angle portions defining grooves which are directed toward each other for receiving alignment bars to extend across adjoining edges of successive extrusions to align them with each other.

11. The combination of claim 10 and wherein said means for supporting the extrusion includes an upwardly directed web extending ,upwardlyfrom said channel to be attached to a member for connecting the extrusion to a supporting beam or the like. 

1. For use in buildings and the like, an elongated extrusion having an upper surface provided with a means for supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located next to a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion and defined by a pair of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to each other and longitudinally of the extrusion and communicating with the interior of said channel, and carrier means for carrying a window-covering unit such as a shade, curtain, or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of the structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said grooves, said carrier means having its side edges located at different elevations to form upper and lower side edges while said grooves are also located at different elevations to form upper and lower grooves for respectively receiving said upper and lower side edges of said carrier means.
 2. The combination of claim 1 and wherein said lower groove of said extrusion is limited at its lower region by an inwardly extending rib of said extrusion and said extrusion being springy for facilitating snapping of said lower side edge of said carrier means past said rib into said lower groove after said upper side edge of said extrusion has been situated in said upper groove.
 3. The combination of claim 2 and wherein said inwardly extending rib of said extrusion is formed with a downwardly directed inclined surface forming a bevel which facilitates snapping of said lower side edge of said carrier means into said lower groove.
 4. The combination of claim 3 and wherein said upper groove of said extrusion is situated next to said upper horizontal wall of said channel while said lower groove is situated adjacent a lower surface of said extrusion, and said carrier means being itself in the form of an elongated extrusion of channel-shaped configuration and having said lower side edge thereof in the form of a rib for snapping into said lower groove.
 5. The combination of claim 4 and wherein said carrier means is formed with a pair of channels one for slidably supporting glides for carrying a curtain and the other for accommodating cords for controlling the curtain.
 6. For use in buildings and the like, an elongated extrusion having an upper surface provided with a means for supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located next to a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion and defined by a paiR of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to each other and longitudinally of the extrusion and communicating with the interior of said channel, and carrier means for carrying a window-covering unit such as a shade, curtain or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of the structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said grooves, an air-conditioning plenum chamber being situated over said extrusion and tiles carried thereby, and said extrusion being formed adjacent said inner side edge region thereof between the latter and said channel of said extrusion with openings through which air can pass from the space beneath said extrusion into the plenum chamber.
 7. The combination of claim 6 and wherein said extrusion is formed with a second hollow downwardly directed channel having a raised horizontal wall formed with said openings through which air flows to said plenum chamber, so that said openings are situated in a recessed portion of the extrusion.
 8. The combination of claim 7 and wherein said extrusion is provided at said second channel thereof with an upper pair of angled portions defining over said upper horizontal wall of said second channel a pair of grooves extending longitudinally of the extrusion and directed toward each other, and members of substantially T-shaped cross section having side edges situated in the latter grooves and an upwardly directed web for connection to a supporting beam or the like so as to form part of said support means with said parts located in said grooves over said second channel being adapted to extend across adjoining edges of a pair of said extrusions which are situated one next to the other for aligning the extrusions.
 9. For use in buildings and the like, an elongated extrusion having an upper surface provided with a means for supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be located next to a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion and defined by a pair of vertical wall portions of said extrusion and an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to each other and longitudinally of the extrusion and communicating with the interior of said channel, and carrier means for carrying a window-covering unit such as a shade, curtain, or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of the structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said grooves, said grooves being located adjacent a lower surface of said extrusion and are situated at the same elevation, said carrier means being formed by a series of plates respectively having opposed side edges situated in said grooves and adapted to be situated beneath the ends of Venetian blind units located in said chennel of said extrusion.
 10. For use in buildings and the like, an elongated extrusion having an upper surface provided with a means for supporting said extrusion in a substantially horizontal attitude from a structural element over the extrusion, said extrusion having an outer side edge region adapted to be locateD next to a frame member over a window and an opposed inner side edge region adapted to support ceiling tiles, said extrusion being formed with an elongated downwardly directed channel extending longitudinally of said extrusion and defined by a pair of vertical wall portions of said extrusion an an upper horizontal wall portion thereof extending between said vertical wall portions, said vertical wall portions respectively being formed with longitudinal horizontal grooves extending parallel to each other and longitudinally of the extrusion and communicating with the interior of said channel, and carrier means for carrying a window-covering unit such as a shade, curtain or the like, said carrier means having opposed edges respectively located in said grooves to be supported by said channel with part of the structure carried by said carrier means situated in the interior of said channel, said carrier means being supported exclusively by the location of said opposed side edges thereof in said grooves, said extrusion having at an upper surface a pair of elongated parallel angle portions defining grooves which are directed toward each other for receiving alignment bars to extend across adjoining edges of successive extrusions to align them with each other.
 11. The combination of claim 10 and wherein said means for supporting the extrusion includes an upwardly directed web extending upwardly from said channel to be attached to a member for connecting the extrusion to a supporting beam or the like. 